Etiquetas

DLPAR issues with cloned AIX LPAR

Recently, I was installing a POWER7 P770 for one of my customers. But instead of installing VIO servers from scratch, we made clones on the storage subsystem (HP 3PAR) from VIOS previously installed on another P770. In one hand, it had the benefit of being a fast method avoiding us to install and configure the Operating Systems, 3PAR multipathing drivers, customer tools; but in the other hand, we have to correct some settings and do some clean-up operations (hostname, devices…).

My customer often uses this method to clone LPAR (AIX/VIO) and as expected DLPAR operations won’t work. Even if my customer usually knows how to correct that, this time had been more tricky because of CAA (Cluster Aware AIX, from AIX 6.1 TL6 & 7.1).

Test Case

I reproduced this issue with 2 LPARs (AIX 7.1 SP3), but this time the second LPAR was cloned from first one’s rootvg using alt_disk_copy command by moving SAN LUN from one LPAR to the other.

LPAR

cloned LPAR

HOSTNAME

meyawi

meyawi-clone

LPAR ID

5

7

IP

192.168.234.71

192.168.234.81

On both partitions, we couldn’t do DLPAR operations :

Only one LPAR is visible from HMC and if we look attentively, IP address is not corresponding to LPAR n°5 and Dcaps value indicates that there is a problem :

meyawi-clone@root:/> /usr/sbin/rsct/install/bin/recfgct
0513-071 The ctcas Subsystem has been added.
0513-071 The ctrmc Subsystem has been added.
0513-059 The ctrmc Subsystem has been started. Subsystem PID is 11731148.

Then after a few minutes, we should be able to do DLPAR operations, it is possible to verify DLPAR status threw HMC :